package com.cg.baseproject.request.retrofit.interceptor;

import com.cg.baseproject.configs.BaseProjectConfig;

import java.io.IOException;
import java.util.List;
import java.util.Map;

import okhttp3.HttpUrl;
import okhttp3.Interceptor;
import okhttp3.Request;
import okhttp3.Response;

/**
 * @author
 * @version 1.0
 * @date 3/8/2018
 */

public class BaseUrlInterceptor implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {
        //获取request  
        Request request = chain.request();
        //从request中获取原有的HttpUrl实例oldHttpUrl  
        HttpUrl oldHttpUrl = request.url();
        //获取request的创建者builder  
        Request.Builder builder = request.newBuilder();
        //从request中获取headers，通过给定的键url_name  
        List<String> headerValues = request.headers("baseurl");
        if (headerValues != null && headerValues.size() > 0) {
            //如果有这个header，先将配置的header删除，因此header仅用作app和okhttp之间使用  
            builder.removeHeader("baseurl");
            //匹配获得新的BaseUrl  
            String headerValue = headerValues.get(0);
            HttpUrl newBaseUrl = null;
            for(Map.Entry<String, String> entry : BaseProjectConfig.mapBaseURL.entrySet()){
                if(entry.getKey().equals(headerValue)){
                    newBaseUrl = HttpUrl.parse(entry.getValue());
                }
            }
            //重建新的HttpUrl，修改需要修改的url部分  
            HttpUrl newFullUrl = oldHttpUrl
                    .newBuilder()
                    .scheme("https")//更换网络协议  
                    .host(newBaseUrl.host())//更换主机名  
                    .port(newBaseUrl.port())//更换端口  
//                    .removePathSegment(0)//移除第一个参数  
                    .build();
            //重建这个request，通过builder.url(newFullUrl).build()；  
            // 然后返回一个response至此结束修改  
            return chain.proceed(builder.url(newFullUrl).build());
        }
        return chain.proceed(request);
    }
}
